Journal Article10.1109/42.811310
A model-based method for the reconstruction of total knee replacement kinematics
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TL;DR: A novel model-based method for the estimation of the three-dimensional position and orientation (pose) of both the femoral and tibial knee prosthesis components during activity is presented and is well suited for kinematics analysis on TKR patients.
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Abstract: A better knowledge of the kinematics behavior of total knee replacement (TKR) during activity still remains a crucial issue to validate innovative prosthesis designs and different surgical strategies. Tools for more accurate measurement of in vivo kinematics of knee prosthesis components are therefore fundamental to improve the clinical outcome of knee replacement. In the present study, a novel model-based method for the estimation of the three-dimensional (3-D) position and orientation (pose) of both the femoral and tibial knee prosthesis components during activity is presented. The knowledge of the 3-D geometry of the components and a single plane projection view in a fluoroscopic image are sufficient to reconstruct the absolute and relative pose of the components in space. The technique is based on the best alignment of the component designs with the corresponding projection on the image plane. The image generation process is modeled and an iterative procedure localizes the spatial pose of the object by minimizing the Euclidean distance of the projection rays from the object surface. Computer simulation and static/dynamic in vitro tests using real knee prosthesis show that the accuracy with which relative orientation and position of the components can be estimated is better than 1.5/spl deg/ and 1.5 mm, respectively. In vivo tests demonstrate that the method is well suited for kinematics analysis on TKR patients and that good quality images can be obtained with a carefully positioning of the fluoroscope and an appropriate dosage. With respect to previously adopted template matching techniques, the present method overcomes the complete segmentation of the components on the projected image and also features the simultaneous evaluation of all the six degrees of freedom (DOF) of the object. The expected small difference between successive poses in in vivo sequences strongly reduces the frequency of false poses and both the operator and computation time.
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Citations
Postarthroplasty Examination Using X-Ray Images
TL;DR: A novel multiview segmentation approach where an active contours 3-D surface evolution with level-set implementation is used to recover the shape of bones and prostheses in postoperative joints, which may then be used to track3-D motions in dynamic X-ray sequences to obtain kinematic information.
Joint Track Machine Learning: An Autonomous Method of Measuring Total Knee Arthroplasty Kinematics from Single-Plane X-Ray Images.
Paris Flood,Lindsey S. Palm-Vlasak,William S. Burton,Amélie Chevalier,Paul J. Rullkoetter,Scott A. Banks +5 more
TL;DR: In this article , a fully autonomous pipeline for quantifying 3D-total knee arthroplasty (TKA) kinematics from single-plane radiographic imaging is presented. But this method requires human-supervised measurements.
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C-arm tracking by intensity-based registration of a fiducial in prostate brachytherapy
Pascal Fallavollita,Clif Burdette,Danny Y. Song,Purang Abolmaesumi,Gabor Fichtinger +4 more
- 23 Jun 2010
TL;DR: Fully automated segmentation-free C-arm pose estimation was found to be clinically adequate on human patient data.
A new registration method for three-dimensional knee nearthrosis model using two X-ray images.
TL;DR: In this paper, a model-based registration method is proposed, in which the CAD model is acquired by reverse engineering and converted into a two-dimensional (2D) image by rendering technique, and the compatibility of the X-ray image and the image of the CAD models is investigated.
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Accuracy of Single Plane X-Ray Image-Based Technique for Assessment of Knee Kinematics
TL;DR: In this article, the femur was placed on an acrylic holder that was attached to a micromanipulator and rotated about in each orthogonal axis of the microman-ipulator over a range of ± 2°in 1°increments and then translated along each orthographic axis over a ranges of ±2 mm in 1-mm increments.
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